kook vs queer duck

kook and queer duck both are nouns.

Word	Noun	Adjective	Verb	Adverb
kook	Yes	No	No	No
queer duck	Yes	No	No	No

As nouns, kook and queer duck are synonyms defined as:

kook and queer duck: someone regarded as eccentric or crazy and standing out from a group

Other synonyms of kook include odd fellow, odd fish, odd man out, queer bird.

kook (noun)	queer duck (noun)
someone regarded as eccentric or crazy and standing out from a group	someone regarded as eccentric or crazy and standing out from a group